Rotate an Image

Using PHP and the GD Library

Using the GD Library we can manipulate images in PHP. This script uses the imagerotate () function to rotate a photo. In our case we are rotating it 180 degrees but this can be changed in the script.

<?php
// The file you are rotating
$image = 'myfile.jpg';

//How many degrees you wish to rotate
$degrees = 180;

// This sets the image type to .jpg but can be changed to png or gif
header('Content-type: image/jpeg') ;

// Create the canvas
$source = imagecreatefromjpeg($image) ;

// Rotates the image
$rotate = imagerotate($source, $degrees, 0) ;

// Outputs a jpg image, you could change this to gif or png if needed
imagejpeg($rotate) ;
?>

Each line in the code is explained with comments. The most important part of this script, the rotating, is done with the imagerotate() function. The parameters of this function are: imagerotate (The_image, degrees_to_rotate, background_color, Optional_ignore_transparency). If the optional ignore transparency is blank or 0, then the transparency is preserved.